batcmd.com Windows 8 Services

ACPI Wake Alarm Driver - Windows 8 Service

ACPI Wake Alarm by Microsoft Corporation.

This service also exists in Windows 10.

Startup Type

Windows 8 edition Windows 8 Windows 8.1 Windows 8.1 Update 1
Core Manual Manual Manual
Pro Manual Manual Manual
Enterprise Manual Manual Manual

Default Properties

Display name:ACPI Wake Alarm Driver
Service name:acpitime
Type:kernel
Path:%WinDir%\System32\drivers\acpitime.sys
Error control:normal
Group:Extended Base

Default Behavior

The ACPI Wake Alarm Driver service is a kernel mode driver. If ACPI Wake Alarm Driver fails to start, the error is logged. Windows 8 startup proceeds, but a message box is displayed informing you that the acpitime service has failed to start.

Restore Default Startup Type for ACPI Wake Alarm Driver

Automated Restore

1. Select your Windows 8 release and edition, and then click on the Download button below.

2. Save the RestoreACPIWakeAlarmDriverWindows8.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer.

Note. Make sure that the acpitime.sys file exists in the %WinDir%\System32\drivers folder. If this file is missing you can try to restore it from your Windows 8 installation media.